← Back to Sessions

Earthquake Transformer Can be Used to Study the Fault of the Western Tibet M6.3 Earthquake, 2020

Session: New Insights Into the Preparatory Phase of Earthquakes From Tectonic, Field and Lab Experiments [Poster]

Type: Poster

Date: 4/19/2021

Presentation Time: 03:45 PM Pacific

Description: 

According to the U.S. Geological Survey, an M6.3 earthquake (33.144°N, 86.864°E) occurred in Western Tibet on July 22, 2020, with a focal depth of 10 km. The focal mechanism solution shows that the earthquake is a tensile rupture with a strike of NNE. Using the catalogue given by China Earthquake Networks Center to study the distribution of aftershocks, it was found that the distribution of aftershocks was inconsistent with the rupture surface direction shown by the focal mechanism solution. The analysis suggested that the reason for this problem may be the area monitoring ability is limited, which leads to a higher Mc of earthquake catalogue. Therefore, it’s hard to use current catalogue to depict the distribution of aftershocks.

A method of using deep learning to detect and pick up seismic phases was applied to the continuous waveforms of the 2000 Tottori earthquakes in Japan. Because of the high efficiency and high sensitivity of this method, more and smaller events were detected. Another advantage of this method is the ability to detect and locate more than two times earthquakes using a portion of seismic stations. In view of the low monitoring capability in western Tibet, this method can be used to detect more seismic events with lower magnitudes from the limited waveform data. This is helpful for analyzing the characteristics of seismic faults using the distribution of aftershocks.

Presenting Author: Yawei Ma

Student Presenter: No

Authors